Organizers, EmbryonicNucleolus Organizer RegionGoosecoid ProteinBody PatterningEmbryonic InductionGastrulaXenopus ProteinsSilver StainingEmbryologyGene Expression Regulation, DevelopmentalOtx Transcription FactorsEmbryo, NonmammalianZebrafish ProteinsHomeodomain ProteinsMesodermXenopusFibroblast Growth Factor 8Nodal ProteinRhombencephalonNotochordHydraMesencephalonZebrafishNodal Signaling LigandsHeadAxisIn Situ HybridizationIntercellular Signaling Peptides and ProteinsWnt ProteinsEctodermXenopus laevisBone Morphogenetic ProteinsTissue TransplantationNervous SystemLIM-Homeodomain ProteinsMorphogenesisSilverCell NucleolusGenes, HomeoboxWnt1 ProteinTranscription FactorsActivinsSignal TransductionLeft-Right Determination FactorsEndodermMolecular Sequence DataMetencephalonBlastulaFetal ProteinsT-Box Domain ProteinsGlycoproteinsFibroblast Growth FactorsProteinsTwins, ConjoinedBlastodermChick EmbryoMatrix Attachment Region Binding ProteinsAmino Acid SequenceBone Morphogenetic Protein 4Silver NitrateRepressor ProteinsTransforming Growth Factor betaAmphibiansbeta CateninHepatocyte Nuclear Factor 3-betaInhibinsTectum MesencephaliTrans-ActivatorsBase SequenceNeural PlateHedgehog ProteinsDNA, RibosomalDrug PackagingProsencephalonModels, BiologicalStaining and LabelingChromosomesRNA, MessengerNerve Tissue ProteinsMicroinjectionsDNA-Binding ProteinsCentral Nervous SystemMutationBlastomeresVertebratesCell DifferentiationTailFollistatinChordataTime FactorsCarrier ProteinsCell LineageGenes, DevelopmentalCytoskeletal ProteinsSequence Homology, Amino AcidChordata, NonvertebrateEmbryonic DevelopmentRNA, RibosomalBlastocystWing